Social bookmarking
Delicious-
This is a web-based way to save, sort, and share your favourite websites, and see what like-minded people are saving.

Glogster
Make a poster which includes text, pictures, sound and video files. When you have made one, upload it to the Glog page to share with others.

Voicethread
This application allows you to share photos or slideshows, and add written or recorded comments.

Dvolver
This application allows you to make a short cartoon with two characters. Written text appears in speech bubbles.

Quizlet
This is a free application for learning and practising vocabulary

Wordle
Wordle is a toy for generating “word clouds” from text that you provide. The clouds give greater prominence to words that appear more frequently in the source text. You can tweak your clouds with different fonts, layouts, and color schemes. The images you create with Wordle are yours to use however you like. You can print them out, or save them to the Wordle gallery to share with your friends.

Voki
Voki allows you to create an avatar which will speak text that you have created, either by typing it in yourself or recording it.

Inka Helwig who teaches German at the Correspondnce School has generously shared these two wikis which contain lots of e-learning links and how-to guides:
Futurepathways
Kunterbunt